...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Agronomy >Early-Season Soil Waterlogging and N Fertilizer Sources Impacts on Corn N Uptake and Apparent N Recovery Efficiency
【24h】

Early-Season Soil Waterlogging and N Fertilizer Sources Impacts on Corn N Uptake and Apparent N Recovery Efficiency

机译：早期土壤渍水和氮肥源对玉米氮素吸收和表观氮素吸收效率的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Soil waterlogging resulting from extreme precipitation events creates anaerobic conditions that may inhibit plant growth and increase N losses. A three-year (2013–2015) field experiment was conducted in poorly-drained claypan soils to assess the effects of waterlogging [0 or 7-days waterlogging at V3 growth stage of corn ( Zea mays L.)] and pre-plant application of different N fertilizer sources and post-waterlogging rescue N application (0 or 84 kg N ha ?1 of urea plus urease inhibitor (NCU + UI) at V7) on chlorophyll SPAD meter (CM) readings, stomatal conductance, ear leaf and silage N concentrations, N uptake and apparent N recovery efficiency (ARE) of two corn hybrids with varying amounts of flood tolerance. Pre-plant N fertilizer sources included a non-treated control (CO), urea (NCU), urea plus nitrification inhibitor (NCU + NI) and polymer coated urea (PCU) applied at 168 kg N ha ?1 . In 7-days waterlogged plots, rescue N applications increased N uptake in PCU treatments 33% and 40% in 2013 and 2014, respectively, as well as in NCU by 48% in 2013. In 7-days waterlogged plots which received rescue N applications, NCU and PCU in 2013 resulted in higher N uptake than CO and NCU + NI by 47 to 77 kg ha ?1 . PCU had higher N uptake than NCU and NCU + NI by 78 and 72 kg ha ?1 in 7-days waterlogged plots that received rescue N applications in 2014. Corn hybrid showed no differences in N uptake and ARE in our study. Our results indicate combining pre-plant N fertilizer source selection and rescue N applications may be a strategy to reduce possible decreases in corn N uptake caused by early season soil waterlogging in average rainfall years.
机译：极端降水事件导致的土壤涝渍创造了厌氧条件，可能会抑制植物生长并增加氮素损失。在排水不良的粘土盘土壤上进行了为期三年（2013-2015年）的田间试验，以评估涝渍[在玉米（Zea mays L.）的V3生长期，淹水0或7天）的效果和种植前的应用叶绿素SPAD计（CM）读数，气孔导度，耳叶和青贮饲料中不同氮肥来源和淹水后施氮的应用（0或84 kg N ha？1的尿素加脲酶抑制剂（NCU + UI）在V7）两种耐旱程度不同的玉米杂交种的氮素浓度，氮素吸收和表观氮素回收效率（ARE）。种植前的氮肥来源包括未经处理的对照（CO），尿素（NCU），尿素加硝化抑制剂（NCU + NI）和以168 kg N ha•1施用的聚合物包膜尿素（PCU）。在7天的淹水区中，抢险施氮量分别在2013年和2014年使PCU处理中的N吸收量增加了33％和40％，在2013年的NCU中增加了48％。 ，2013年NCU和PCU的氮吸收量比CO和NCU + NI高47至77 kg ha？1。在2014年接受抢险施氮的7天淹水田中，PCU的氮素吸收量比NCU和NCU + NI高78和72 kg ha？1。在我们的研究中，玉米杂交种的氮素吸收和ARE没有差异。我们的结果表明，结合种植前氮肥的选择和氮素的施用可能是减少平均降雨年早期土壤渍水引起的玉米氮素吸收量可能减少的一种策略。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号